Speed-regulator for explosive-engines.



No. 777,295. PATENTED DEC. 13, 1904.

' G'. MARX, JR.

SPEED REGULATOR FOR EXPLOSIIVE ENGINES.

APPLICATION FILED MAR. 3, 1903.

2 SHBETS-BHEBT 1.

N0 MODEL.

ATTORN 5Y5 No. 777,295. PATENTED DEC. 13, 1904.

' G. MARX, JR.

SPEED REGULATOR FOR EXPLOSIVE ENGINES.

APPLICATION FILED MAR. 3, 1903.

2 SHEETS-311E131 2.

NQVMIODEL.

zflmsea MM No. 777,295. Patented. December 13, 1904.

UNITED STATES PATENT OEEIcE.

GEORG MARX, JR, OF NUREMBERG, GERMANY, ASSIGNOR TO THE FlltM OFVEREINIGTE MASOHINENFABRIK AUGSBURG UND MASOHINEN- BAUGESELLSOHAFTNURNBERG A.-G., OF NUREMBERG, GERMANY.

SPEED-REGULATOR FOR EXPLOSlVE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 777,295, dated December13, 1904. Application filed March 3, 1903- Serial No. 145,968. (Nomodel.)

T whom it y (JWWGYW' l ver 6 is pivotally connected with a valve-spin-Be it known that I, GEORG MARX, J r., engidle e in such a way that itsaxis of rotation neer, asubject of theEmperor of Germany, rewhen thevalve is closed coincides with the siding in Nuremberg, in the Empire ofGeraxis of rotation 01" the roller-track 20. As

5 many, (whose full postal address is Martin thus the point of rotationof the passive roller- Richterstrasse, Nuremberg, aforesaid) have trackis on the same axis as the point at which invented certain new andusefulImprovements when the valve is closed the active roller-lever inSpeed-Regulators for Explosive-Engines, engages the valve-spindle, bothlevers t and of which the following is a specification. w alwaysencounter one another in the same 1 This invention has for its object areleasing position, and this position is independent 01''distributing-gear for the gas-valve of gas-enthe actual condition of thegovernor. Oongines working with qualitative regulation. sequently theselevers always meet without The object of the invention is to operate theshock if the system has been correctly worked gas-valve by means of asimple eccentric gear, out from one position. The lever a, carry- I5 sothat the opening of the valve alters with ing a roller '1', is connectedwith a governorthe load, while the cut-off of the valve always spindlet, so that the roller-track 10, which takes place ata certain positionof the enginerests by means of its steeply-inclined track 8 5 erank thatis to say, is unalterable. The on the said roller, assumes a higher orlower time for the opening of the valve is so selectposition, accordingto the condition of the 20 ed that at the lowest position of thegovernor governor. The disconnecting mechanism is (corresponding to thebiggest loading on the formed of a free-hanging pawl 71!, mounted atengine) it is somewhat in front of the comthe point a, which pawl bymeans of an in- 7 mencement of the suction-stroke, while itsertion-piece 'm slides on a similar insertionalters with the stroke ofthe governor, and piece m in the lever Z). The touching-surfaces 5 whenthe governor is in its highest position of the pieces m are curved on acircle the cencoincides with the cut-off at the end of the ter of whichis formed by the pivot (1-. The suctionstroke, so that in this positionthe gaspawl is provided with a downwarly-extendvalve is not opened. ingprojection which carries a steeply-in- Now the present inventionendeavors to clined track 0. An eccentric-rod c is also 3 solve theproblem of meeting all the requirepivoted on a link J at the point a,which at ments hereinbefore enumerated by the comthe other side isrevolubly connected at the bination of a roller-lever system regulatedpoint 0 with the valve-lever Z). The rod is 30 by the action of thegovernor, and thereby moved up and down in the ordinary mancausing thealteration of the opening-point, ner by means of an eccentric keyedfirmly on 35 and a releasing mechanism always snapping the way-shaft 2.This movement causes the off at the same point of time, and therebysteeply-inclined track 0 to travel on its roller maintaining a constantcut-off. g, and thereby releases the lever b from the 5 The invention isshown in the accompanypawl The releasing-roller g in the form ingdrawings in vertical section in Figures 1 of construction shown in thedrawings is 4 and 2, while Fig. 3 represents the new valvemounted on aprojection of the air-buffer casgovernor in its application to anexplosiveing a, the air-bufi'er a of which is linked to power engine.the front end of the valve-lever Z) and rests 9 The passive roller-trackis formed by a leon a lifting-spring 2', bearing against the botver to,one end of which is pivotally mounted tom of the casing e. 45 in avalve-yoke and its other end, which has The distribution is in theaccompanying astceply-inclined track 8, rests on the roller of drawingssupposed to be with a closed valve a lever a, regulated by the action ofthe govand at the moment of the commencement of ernor. The rear end ofthe active roller-lethe contact of both roller-levers, Fig. 1 showingthe lowest and Fig. 2 the highest position of the governor. Thedistribution shown in Fig. 1 at the lowest position of the governor andwith the valve closed is effected in the following manner: In thedownward movement of the eccentric-rod the parts Z Z) are moveddownward, constantly pressing the pawl 70 downward also, whereby contactis produced between the parts I) and w earlier or later, according tothe position of the governor, and thus the lift of the valve commences.The pawl k, after reaching the disengaging-position which remainsconstant for all positions of the governor, releases the lever 1),whereby the valve closes under the action of its own weight and avalve-closing spring f, while at the same time the partb travels alongthe part 70. The complete return of the lever b to its initial positionis effected by means of the lift-spring 7' and the air-buffer 7L. Afterthe release of the pawl the eccentric-rod e and pawl 73 and link Zcontinue the movement; but shortly before the highest position isreached the pawl 70 engages, so that the steeply-inclined track 0 againencounters the roller q, and in order to deaden the sound of the rollerdropping on the track the respective part of 0 is made resilient, forinstance, by the placing thereon of a strip of leather w. The movementcan then recommence.

The sliding lever 70 occupies various positions, according to theposition of the governor, while the outer end m of the active slidinglever b is constantly moved in the same manner by the contact betweenthe two sliding levers b and w, and therefore also the beginning of thevalve motion, occur at varying points of time. Moreover, the stroke ofthe valve depends at every point upon the respective position of thegovernor that is to say, not only the point of time when the valve opensbut also the stroke of the valve are influenced by the governor.

' The arrangement of valve distribution heremeans of pawl Consequentlyinbefore described necessitates when the valve is closed the arrangementof the passive and active levers on a uniform axis, so that a lift isobtained free from shock, if it be ascertained for one position. As theair-buffer, in consequence of the time of snapping in of the pawl beingthe same at all charges, describes the same course, a constant positionof the air-suction valve may be maintained and a quiet and uniformclosing of the valve attained.

I declare that what I claim is 1. In combination, a valve, a lever 6connected thereto, a movable fulcrum for the said lever comprising alever 20, a governor for controlling the position of the said lever w,mechanism for operating the lever 6 arranged to be disengaged therefrom,and means for throwing the said mechanism out of engagement with thesaid lever b at a certain point of the stroke, substantially asdescribed.

2. In combination with a valve, a leverb pivotally connected thereto, afulcrum for the said lever comprising a lever w with a pivotsupporttherefor, means operating the lever b and means for controlling theposition of the lever w, the pivotal points of the levers b and 10 beingaxially in alinement when the valve is closed.

3. In combination a valve, a lever pivotally connected therewith, pawlis for engaging the lever, said pawl being suspended from a pin a, meansfor connecting the said pin with the said lever, means for reciprocatingthe pawl to engage the lever and means for throwing the said pawl out ofengagement with thesaid lever, said engaging and said disengaging actionoccurring at the same points in the stroke of the pawl if substantiallyas described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

GEORG MARX, JR.

WVitnesses:

ANDREAS STIoH,

HENRY ENGELHARD.

